<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>

</body>
</html>
<script>
    var arr = [15,25,35,45];
    console.log(arr[1]);
    var json = {width: 25,height:30};
    console.log(json.width);
    var json1 = {name :"刘德华",age: 55};
    console.log(json1.name);  // 输出名字
    console.log(json1.age);  // 输出年龄

</script>